/// <summary>
/// Called when an <see cref="IfBlock"/> block is read.
/// Verifies the structure of the IF condition and calls the corresponding
/// functions that handle the code generation for the condition.
/// Called by <see cref="INSTRUCTION"/>.
/// </summary>
void IFF()
{
Expect(31); // "if"
Expect(10); // '('
SUPER_EXP();
Expect(12); // ')'
try { QuadrupleManager.IfAfterCondition(); }
catch (Exception e) { SemErr(e.Message); }
Expect(7); // '{'
while (StartOf(1))
{
INSTRUCTION();
}
Expect(8); // '}'
try { QuadrupleManager.IfEnd(); }
catch (Exception e) { SemErr(e.Message); }
}